Plasma provides components for multi-device workspaces. Plasma desktop
provides a stable, versatile and modular desktop.
Plasma Mobile shares many components and all of its underlying
architecture with Plasma desktop, but provides a UI and features
necessary and useful on mobile devices. The idea is to provide a base
platform, that can be augmented with device-specific modules. On a
laptop, one would typically install plasma-workspace and plasma-desktop,
while on a mobile device, one would install plasma-workspace and
plasma-mobile and friends. None of the repositories conflicts with
others, so it’s possible to provide a system with UIs for multiple
formfactors, and decide at runtime, which UI to offer. You can find the
source code tarballs of the stable releases of Plasma on
download.kde.org or check the git
repositories on cgit.kde.org.

Plasma Mobile does not have stable release yet. So, we advise you to pull
the code directly from our git repositories’ master branches at invent.kde.org. In the following section you may find direct links to the source code of several Plasma Mobile components.